Discussions By Symptom: Testicle Pain

i have been having pain in my testicles all day long.

I am 15 yeasr old and i have been havin pain in my left testicle mostly but some in the right also all day long, a few hours after i woke up and no i didnt do anything active today or the day before so cant be because of that. I am overseas so i am wearing traditional shalwar kameez which does not require you to wear underwear as the people here say. I had this pain a while back and i quickly wore underwear and the pain went away but today even after wearing underwear the pain was still there. I dont have any lumps, and yea they are hanging evenly and even look the same in size and the color is normall, i also havent had any sort of damage as in blow to them either.could it actully just be cause i dont wear underwear on a daily basis or something else. I need expert guidence as i am very confused and scared because of alot things i found on the net.